Protect your DeFi protocol from top to bottom. We look at your core rules, how you handle upgrades, and how you link to the outside world to make sure every part is secure.
Smart contract architectureDesign patterns
Business logicEconomic models
Token mechanismsPermission control
Upgradeability and proxygovernance modules
Integration with oracles, bridges, and DeFi protocols
Testing coverage and deploymentOperational securityWe start by looking at your finished Solidity code and your project plans to see exactly what needs to be checked. Then, we give you a clear price based on how complex your solidity contract audit will be. We can also sign a privacy paper (NDA) to keep your work secret.
Plan Your Audit & Get a Price
We start by looking at your finished Solidity code and your project plans to see exactly what needs to be checked. Then, we give you a clear price based on how complex your solidity contract audit will be. We can also sign a privacy paper (NDA) to keep your work secret.
Sign the Deal & Pick a Date
Next, we agree on the payment and the project rules. We create a simple schedule for your Solidity smart contract audit so you know exactly when we start and when we will finish.
Find Bugs & Check Your Fixes
Our team uses powerful, custom tools to scan your code for any security gaps. We talk to you about every problem we find, help you fix them, and then check your code again to make sure it is safe. For big projects, we might do this several times to be 100% sure.
Get Your Final Safety Report
Finally, we give you an official and signed report for your Solidity security audit. This document lists every risk we found and gives you easy, step-by-step instructions on how to keep your project secure.
We combine expert knowledge with our own special tools to make sure your Solidity code is safe and works perfectly.
“BlockSec has shown remarkable professionalism in smart contract audits. Their expertise in blockchain and smart contract technology, along with a meticulous approach, ensures thorough identification and resolution of security risks. We highly commend their professionalism and anticipate continued collaboration.”
“It's been a fantastic experience collaborating with BlockSec. You have shown your professionalism in the audit field, especially on the smart contract side.”
“With a keen eye for detail, the team identify potential vulnerabilities and provide robust solutions, ensuring our contracts are secure and optimized. For anyone in need of expert smart contract auditing, I cannot recommend BlockSec highly enough.”
“The BlockSec team is very knowledgeable, punctual, responsive, and diligent during the entire audit process. We highly recommend BlockSec for any smart contract protocols who are seeking great value for money in the audit field.”
“I want to extend my sincerest appreciation to BlockSec for conducting a thorough audit of the Stratos project. Their meticulous approach and insightful feedback have significantly contributed to enhancing our project's security and reliability.”
“It's also worthwhile to look into trustworthy auditing companies like @BlockSecTeam. Such audit reports are a gold mine of knowledge ⛏️🕯️”
We don't just skim the surface; we dive deep into every single line of your code to find hidden bugs that others miss.
We make sure your project's economic rules and money flows make sense, protecting you from logic flaws, not just coding errors.
We use mathematical proofs (Formal Verification) to guarantee that the most critical parts of your code simply cannot fail.
We don't use a "one-size-fits-all" approach; we build specific tests just for your unique project to catch edge-case problems.
~$39.5M Lost: Allbridge, Wanchain & More | BlockSec Weekly
During the week of July 20-26, 2026, 8 notable security incidents resulted in approximately $39.5M in total losses across Solana, Ethereum, BNB Chain, Arbitrum, Zilliqa, and Cardano. The highlighted Allbridge Core incident (~$1.65M) exposed a Solana input validation flaw where the same Pool account was accepted in both swap roles, with analysis reconstructed entirely from the deployed program binary. Other analyzed incidents include Wanchain (~$500K, flawed message encoding in a Cardano bridge validator), Zilliqa (~$400K, flawed nonce generation in a Ledger app since 2019), and Lien Finance (~$542K, flawed validation logic in bond exchange).
Top 10 "Awesome" Security Incidents in 2025
To help the community learn from what happened, BlockSec selected ten incidents that stood out most this year. These cases were chosen not only for the scale of loss, but also for the distinct techniques involved, the unexpected twists in execution, and the new or underexplored attack surfaces they revealed.
Newsletter - December 2025
In December 2025, the DeFi sector encountered three significant security incidents, resulting in total losses of approximately $19.7 million. Yearn Finance faced nearly $10 million in losses due to vulnerabilities in its yETH pool and legacy contracts. Trust Wallet suffered a malicious backdoor attack on its Chrome extension, leading to losses of about $7 million. Ribbon Finance experienced a loss of $2.7 million due to improper access controls.
